The Str-ff is a follow focus from Ikan's Stratus line with built-in hard stops and horizontal placement. The hard stops are set with screws in red and blue aluminum rings. To set a stop, simply tighten the screw on the desired band, and then do the same with the other band to set a hard focus range. Stops can be completely removed by removing the screws or, to keep from losing pieces, the user can simply disengage the stop itself and flip it off of the hand wheel. The Str-ff comes with a .8 pitch lens gear and a 13"" long reusable lens zip gear, also with a .8 pitch..